Medium Severity — Powertrain OBD-II DTC

U0242:

U0242 is a diagnostic trouble code indicating: Lost Communication With Headlamp Control Module B. This code relates to the network communication system. It has been reported in NHTSA complaints across 1 different vehicle models.

⚡ Quick Summary

Severity

Medium

DIY Level

Moderate

Repair Cost

Urgency

Fix within weeks

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Disclaimer: This information is for educational purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. Always consult a qualified mechanic for diagnosis and repair. Repair costs shown are estimates and may vary by location, vehicle, and shop.